Stormwater Annual Report

Page 62

Notes: (1) (2) (3) (4) (5)

Seasons: Summer (S): June 1st through October 30th (highlighted yellow). Winter (W): November 1st through May 31st (highlighted blue). Flood Event: Storm intensity exceeding the 100 Year, 2-Hour storm event (i.e. >2.2 inches in two hours). Normal Storm: Storm intensity up to and including the 100-year 2-hour duration storm event (i.e. < 2.2 inches in two hours). Insufficient Rainfall: Rainfall intensity below design storm requirments (i.e. less than 0.10 inches per hour). Where sufficient rainfall did occur, indicate one of the following results and/or describe in the "Notes" section: DS (Dangerous Storm): Adverse climatic conditions existed that created a dangerous condition for stormwater monitoring staff (e.g. local flooding, high winds, lightening, etc.). Generally for discrete sampling only. DWF (Dry-Weather Flow): Dry-weather flows were identified prior to event that may contain quantities and concentrations of pollutants that would significantly alter stormwater samples. EM (Equipment Malfunction): Equipment failed to enable to collect a composite sample or failed to notify stormwater monitoring personnel that a representative storm had occurred. HE (Human Error): Sampling was not conducted due to human error. HT (Hold Time): Permit requires sampling events for each location to be at least 72 hours since the last storm event discharge (i.e. flow in response to rainfall). IF (Insufficient Flow): Storm did not result in a level reading of two or more inches at the monitoring location. IM (Insufficient Manpower); Storm occurred during off-hours where a less than 20% chance of rain was forecasted and/or appropriate stormwater monitoring personnel were unavailable to respond. IS (Insufficient Sample): Did not collect enough aliquots to qualify as a flow proportional composite sample. NR (Not Required): Samples have been collected for all analyses for current season. SC (Sample Collected): Sample was collected during this storm event.

Storm Event Records

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